Why is the patient's neck swollen after surgery?
D000038:Abscess / Q000000981:diagnostic imaging / Q000209:etiology*; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D017214:Laryngeal Masks / Q000009:adverse effects*; D008480:Mediastinitis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000517:prevention & control; D009871:Operating Room Nursing; D010353:Patient Education as Topic; D018579:Patient Selection; D011859:Radiography; D017703:Retropharyngeal Abscess / Q000000981:diagnostic imaging / Q000209:etiology* / Q000517:prevention & control; D012307:Risk Factors; D017751:Safety Management